Static ward leonard drive
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The document discusses different methods of speed control for DC motors using static ward Leonard drive systems. It describes single phase and three phase fully or half controlled rectifier configurations that provide variable DC voltage to the motor, allowing control in one or two quadrants. Low power applications typically use a single phase fully controlled rectifier while high power uses three phase. The systems can operate in continuous or discontinuous conduction modes to control motor speed and torque characteristics.
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Abstract - This paper deals with the speed of dc motor can be control by using chopper is to designed the four quadrant speed control model. the speed control of dc motor provide designed model for four quadrant in both direction i.e. clockwise direction, counter clockwise direction along with braking of the dc motor .this operation will not superior than ac motor , compare with dc motor because the ac motor changing the rotation of motor is unmanageable and complicated to design as compared with the dc motor. Therefore for the smooth in operation we can used the insulate gate bipolar transistor (IGBT). For speed control of dc motor in both direction the chopper circuit is designed by using IGBT. The pulse width modulation (PWM) is used foe switching operation of IGBT. The PWM designed signal model can be generated by using IC LM324 (quart op-amp). To control the direction and the speed of motor, the four quadrant speed control technique is not a complicated
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Static ward leonard drive
- 1. ED&C – Speed control methods of DC Motor_Static ward Leonard Drive BY P.KARTHIKEYAN/AP/EEE/KEC
- 2. Static ward Leonard Drive • Controlled rectifier – Variable DC voltage • Also known as Controlled rectifier fed dc drive • 1Φ and 3Φ fully controlled rectifier provide DC voltage in either direction, so it allows motor control in quadrant I and IV • 1Φ and 3Φ half controlled rectifier provide DC voltage in oe direction, so it allows motor control in quadrant I • Low power application - 1Φ fully controlled rectifier • High power application - 3Φ fully controlled rectifier 2
- 3. Single phase fully controlled converter fed DC Motor 33
- 4. Single phase fully controlled converter fed DC Motor 44
- 5. Single phase fully controlled converter fed DC Motor 55
- 6. Single phase fully controlled converter fed DC Motor 66
- 7. Vs απ + βα π β απ + βα π β E 1 2TT TT 43 απ + α IV aa tω tω tω tω Discontinuous conduction mode
- 10. Two Quadrant operation of the drive 10 Speed torque characteristics
- 11. Single phase Half controlled converter fed DC Motor 1111
- 12. Single phase Half controlled converter fed DC Motor 1212
- 13. Single phase Half controlled converter fed DC Motor 1313
- 14. Vs απ + βα π β απ + βα π β E 1 2TT TT 43 απ + α IV aa tω tω tω tω Discontinuous conduction mode
- 17. One Quadrant operation of the drive 17 Speed torque characteristics
- 18. Three phase fully controlled converter fed DC Motor 1818
- 19. 19
- 22. 22 Three phase supply Dual Converter A B VA VB L1 L2 Three phase supply
- 23. Chopper control of separately excited DC motor 23 VA ia1 ia2 va Ia va Ia ton T ωt